setbacks in her meteoric career have come, ironically, on award nights, as when kanye west grabbed the mike from her... and the time she sang a live duet with stevie nicks at the grammys off-key. one nasty review said she had killed her career overnight, and was "too young and dumb to understand the mistake she'd made." >> taylor swift: the things that were said about me by this dude floored me and, like, leveled me. and i... i don't have thick skin. i hate reading criticisms. you never really, like, get past things hurting you. >> stahl: but then, taylor did her thing and turned the wound into a song... ♪ ♪ >> stahl: the hit single "mean." and in the music video, taylor broadened it beyond herself to a boy in a locker room reading a fashion magazine, a girl who shows up wearing something different. the song has taken on a life of its own-- a sort of anti- bullying, anti-meanness anthem. ♪ ♪ ♪ there's a deep, deep connection here. as one of her fans told us, "taylor lets us know it's okay to be ourselves." ♪ say yes ♪ and all you're evero be is mean ♪ scott borchetta says sh